Let's get this math done. We have 573 and we're going to multiply it by 9. This is the same as taking 573 and adding it to itself 9 times.
Step 1: 0 + 573 = 573
Step 2: 573 + 573 = 1146
Step 3: 1146 + 573 = 1719
Step 4: 1719 + 573 = 2292
Step 5: 2292 + 573 = 2865
Step 6: 2865 + 573 = 3438
Step 7: 3438 + 573 = 4011
Step 8: 4011 + 573 = 4584
Step 9: 4584 + 573 = 5157

So, 573*9 = 5157